For myself, I would try but I would put a lot less effort into correcting the stores mistake than I would if it was my own.
I would call or email once. If I ended up in endless phone hold land being directed to their website there is a good chance I would just hang up.
I would not pay for shipping even if I got reimbursed. I would take the package to either of two places in the nearby shopping center but not to any other that I would need to waste time driving too.
Basically I would notify them off the error, but I expect them to do 90% of the work to get the item back.
Agreed. I don't have the mindset of 'free stuff' when it comes to things like this.
I'd had super cool manual can opener that I loved and 14 years in, it quit working. It was pricey and heavy duty so I called the company, Kuhn Rikon to see if it could be fixed and if not, could they recycle it if I sent it back. They explained they could not fix it but would recycle it and even they were impressed that it lasted that long. When I said I'd like to buy a new one they said they'd send me one as a gift (woohoo!) as well as a labeled, postage-paid envelope to send them my old one.
Well, when they sent me two can openers (in two separate deliveries), I immediately contacted Kuhn Rikon, who thanked me for my honesty and they told me to keep it! (woohoo again!).
If OP's dad sold something over Ebay and accidentally included something else, I'm sure he'd appreciate the buyer's efforts of trying to return it.
The company will likely send something like a postage paid label or envelope to send the gadgets back if they want them (they may decide it's not worth the hassle and tell OP's dad to keep them. But the company should be given at least one chance to make that decision.
As far as the OP, I agree that Dad is an adult and this is his issue and OP can share her feelings and then leave it alone, no matter what her dad does.